Feeding mechanism for sewing-machines.



, PATENTED DEC. 31, 1907'.

$HEET 1.

APPLIOATION FILED 0OT.26. 1903.

5 SHEETS- No. 875,616. PATENTED DEC. 31, 1907.

W. N. PARKES.

FEEDING MECHANISM FOR SEWING MACHINES. ABPLIUATION FILED 0015.26. 1903.

5 SHEETS-SHEET 2.

WITNESSES; m I i iNVENTOR.

No. 875,616 I PATENTED DEC. 31, 1907. W. N. PARKES.

FEEDING MECHANISM FOR SEWING MACHINES.

APPLIOATION FILED 00T.26. 190s. a BHEETS-SHEET a III!" 7.

' BY 45 I X? 4, 6. I I & ATTOR EY No. 875,616; PATENTED DEC. 31, 1907.

W. N. PARKES.

FEEDING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED OOT.26. 1903.

5 SHEETSSHEET 4.

BY Mil fi W1] ATTO R N EY No. 875,616. PATENTED DEC. 31, 1907.

' W. N. PARKES.

FEEDING MECHANISM FOR SEWING MACHINES.

APPLIOATTION FILED 00T.26. 1903.

5 SHEETS-SHEET 5.

WITNESSES: INVENTOR.

' UNITED STATES PATENT onnrond WILLI-AMN. PARKES, or BROOKLYN, NEW YORK.

FEEDIN G MECHANISM FOR SEWING- MACHINES.

. Specification of Letters Patent.

- Application filed October 26,1903. Serial No. 178,628.

To all whom it may concern:

Be it known that I, WILLIAM N. PARKES, a citizen of the United States,residing in Brooklyn, county of Kings, and State of New York, haveinvented a new and useful Improvement in Feeding Mechanism forSewing-Machines, of which the following is a description.

This invention relates to sewing machines, and particularly to thefeeding mechanism thereof. i

It has for its main object a simple compact mechanism for feeding thework which may be run at a very high rate of speed.

It also has for its objects a compact device, the dog of which receivesall of its movements from a sin le eccentric, said device constructedand adapted to operate in combination with a special form of hook mech-'anism, and said feeding and hook mechanism so constructed that both ofsaid mechanisms .may .be mounted on a single detachable readily insertedand removed fromthe bobbin case.

And still another object of said in- 1 vention is to construct saidfeeding mechanism, said hook mechanism, and the bracket on which saidmechanisms are mounted so that a bobbin controller mechanism may also bemounted on said bracket, and all of these mechanisms be operated incombination on said bracket.

'It is also an important object of this invention to construct saidfeedin mechanism to cooperate with a hook whic revolves in a horizontalplane, and that has two revolutions to each reciprocation of the needle.

The invention as a whole comprisesin comblnatlon a feedmg mechanism, arevolving looper mechanism, a bobbin controller mechanism, all mountedon a detachable bracket,-

and all operated from the revolving movement of a single revolvingshaft, and all adapted to cooperate with a reciprocating needle that maybe moved laterally. Havin pointed out some of the advantages'an objectsof my invention, it is to be understood that my invention consists incertain features, elements and combinations of mechanisms, producin andtending to produce such objects an advantages and also othershereinafter detailed, as hereinafter described and claimed.

Referrin to the drawings, Figure 1 is a front end e evation of a sewingmachine embodying my invention, the work-plate-or bed being in dottedlines to clearly show the location and arrangement of the mechanismsupported by the same; Fig. 2 is a top plan of the work-plate orv bed,the arm bein removed; Fig; 3 is a bottom plan view 0 the same; Fig; 4 isa top plan of the detachable supporting bracket showing arrangement ofparts thereon; Fig. 5 is a vertical sectional View of the same taken onthe line 55 of Fig. 4 looking in the direction of the arrow;

Fig. 6 showsa detail, partially in section, of

one form of means for operating the feed;

Fig. 7 is a top plan-view of a portion of such means of Fi 6; Fig. 8 isa vertical sectional. view on the are detail views of several parts of te feeding e 88 of Fig; 4; Fi s. 9 to 13 mechanism; Fig. 14 is aperspective view of the detachable bracket d, the view being. from ar1ghthand elevated position; an

Fig. 15 is a side elevation of a portion of the driving-shaft, showingthe looper driving gear, feed -eccentric and reduced portion thereof.

the machine and B the lower shaft. The lower shaft B may be driven inany suitable manner, but preferably by a sprocket on the PatentedDeaBI,1907. v

In the drawings A represents the bed of I main shaft and asprocket-chain therefrom to the sprocket 1, on the lower shaft B. Thisshaft B has a one-to-one movement with respect to the main shaft (notshown) which actuates the. needle holder and operating mechanism. Theseparts last described have not been shown more in detail because notessential to and not formingpart of my present invention. p

To the forward end of the shaft B is attached a bevel 'gear2, whichmeshes with a bevel gear 3, the latter being attached to the lower endof a shaft 4, mounted in a suitable bearing 5 depending from a bracket(1. The bearing 5, is provided with bushings 5 affording journals forthe shaft 4, said journals being fixed in lace by set-screws 5 To theupper end 0 shaft 4 is attached a hook 6 which is suitably constructedto carry a bobbin-case 7 in which is located a bobbin 8. The bevel gear2 is twice the diameter of the gear 3 and therefore the book 6 rotatestwice v to each reciprocation of the needle. The

hook mechanism used. in combination with this feed mechanism issubstantially the same as is shown and described by me in my Patent No.730,692, dated June 9, 1903' This hook as therein described alternatelyengages a loop of needle-thread and casts the patent, and as will benoticed the said hook groove 9 formed in the cam-disk 9.

mechanism of said patent, or more especially the driving mechanism forsaid hook mechanism has been modified to make it more adapted for use incombination with my improved feeding mechanism.

he bobbin controller mechanism is as follows: To the shaft B, isattached a cam disk 9, which has a cam-groove 9 formed, in it asindicated in Figs. 4 and 8. Extending upwardly from the top ofthebracket d are lugs or bearings 10 and 11, in which are mounted toturn a shaft 12, to one end of which is attached an arm 13, the lowerend of which carries a roller 14, which operates in the cam- On theshaft 12 are located collars 15 and 16,'which serve to retain the shaft12 longitudinally in the bearings 10 and 1.1. On a reduced portion, (notshown) formed on the collar 16 is located a bobbin-controlling arm 17,which is free to turn on the said reduced portion, an adjustableclamping-piece 18 being constructed to retain the said controllin on thesaid reduced portion of the col ar16 and at the same time tolocate theworking position of the controller 17.

On the shaft 12 is coiled a spring 19, the end 20 .of which enters thecollar 15 and the end 21, entering a small tubular piece extending fromthe controller 17, rotary adjustment of collar 15 serving as a means toregulate the tension of the spring 19 and through it the pressure of thecontroller 17 on the bobbin This bobbin controller mechanism is morefully described and claimed in my copending application Serial No.154,457, filed April 27, 1903. itself this bobbin controller mechanismis not a part of my present invention, but as an element of mycombination looper and feeding mechanism, it is a part of'my presentinvention, and in this respect it will be herein claimed.-

In suitable bearings in the head of the machine is located a presser-bar24 to the lower end of which is attached-a presser-foot 25, a presserlifter 26 serving to lift the presser-bar 24 and a spring 27 partlyshown, serving as a means for depressing the presser-bar. A needle-bar22 which carries a needle 23 is reciprocated from the main shaft'in anyusual manner. \Said needle-bar is mounted in a vibrating gate 22 havingits'jonrnal bearings on the presser-bar 24 as shown at 22*.

The said gate is vibrated in any usual manner.

Hook 6, parts in connection with it, means for operating and carryingit, bobbin-controller, needle-bar and operating mechanism, presser-bar,presser-foot, etc., which have been partly described and shown, form nopart of this invention by themselves, but they do form a part of thisinvention in respect of their combination and location, as will behereinafter specified. h

On the hub of the gear wheel 2, I form an eccentric 28 having a slightlyreduced end portion 29,]which serves as a means for carrying a collar 30and also as a means through which the eccentric may be adjusted on theshaft B by means of set screws 31, one only of which is shown, (Fig.'8). .Holes 32, (one only of which is shown,) serve as a means throughwhich the screws 31 may be mani ulated to adjust the eccentric 28. Theco lar 30 is attached to the reduced portion 29 by means of a set screw30. A jacket or angular block 33 is mounted on the eccentric 28, thecollar 30 and the back of the gear 2, retaining the block fromlongitudinal 'move ment on the eccentric, but permitting it to turnfreely, the reduced portion 29 preventin the collar from being adjustedtoo close to the block 33. On a stud 34 secured in a downwardlyextending part 34' of the bracket (1, by a screw 34, I mount a lever 35having jaws 36 and 37 formed thereon. In the jaw 36, see Figs. 5 and 12,I form akeyway ,38, in which is located a tongue 39 formed on anadjustable piece 40,a screw 41 assing through a slot 42, see Fig. 6, andaving a seat 111 the adjustable p1ece 40 serving as a means forretaining the said piece in position. The adjacent surfaces 0 the piece40 and the-jaw 36 are inclined as 1s clearly shown in Fig. 7, the piece40 being a wedge, and, therefore, by adjusting the piece 40 downwardly,any lost motion between the jaws 36 and 37 and block 33 may be taken up.Integral with the lever 35 is the extension or arm 43 having a way orgroove 44 in which is located a shoe 45 loosely mounted on an end .46 ofa clampin bolt 47, the said bolt beingr secured in a s 0t 48 formed in alever 49.

he lever 49 is pivoted on a shaft 54, held rigidlyin arms 55 and 56 v isjournaled to turn on a short shaft 64, said shaft 64 being mounted atits ends in parallel arms 66 and 67 formed on a link 68, the lower endof which is pivoted on a shaft69, which 55 and 56 being long enough topermit of this adjustment and the collars 72 and 73 being held by screws72-. and 73*. In the under side of the bracket (1, I form a receptaclein whichis housed one end of a spring 74, the other end being inengagement with the outer end 71 of the lever 71 as shown in Fig. 5.This spring serves as a means for depressing the outer end of the lever71 and keeping the same in sliding engagement with the block 33. Thespring 74 may be centered by pin- 74 on lever-end 71 The arms and 76 ofthe duplex feed-bar 63 have placed be tween them afeed-dog. 77, which isrigidly attached to the shaft 64 by means of a setscrew 78, a downwardlyextending portion 79 being formed on said feed dog for the bearing forthe dog on the'shaft 64. The portion 79 of the feed-dog 77 just fitsbetween the arms 75 and 76 of the feed-bar 63, and the arms 75 and 76just fit between the arms 66 and 67 of the link 68. Thus it will beseen, all the parts are securely .held in place on the said shaft 64,arms 66 and 67 and arms 75 .and 76, being free to turn on the shaft andthe latter, being rigidl attached to the dog 77, turns with the said 0g.

It will be observed by referring to Fig. 5, that the to of the block 33is curved so .as to form a roc ing contact between the end 71 of thelever 71, and the top of the said block 33. ltwill also be observed,that the spring 74 is located directly over the center of the 1 shaft B,which is the most favorable position for the action of said spring, andthat the pin 74 retains the spring central with respect to the house 111which t is located, so the said s ring is adapted to act very freely,and be a ways retained in its proper location. It may be further notedin connection with said spring 74, that its function is simply to keep"the end 71 of the lever 71 in engagement with the top of the block 33,andthat when the feed dog is making its functional movement, it receivesa positive action upwardly, and in a direction with the movement of thework. This will be more fully noticed further on in the description. I

To the feed-bar 63, I attach a spring by means of ascrew 81, a way beingformed on the bottom and around the end of the feed-bar 63 for thelocation of the said spring and to prevent the same from turn-,

mg, as shown n Fig. 10, at 80 by dotted lines. The spring as is clearlyshown in Figs. 1 and 5', is bent around the end of the.

feed-bar and extends downwardly between the bifurcations of the same,the free end of the spring engaging an extension 82 formed 74 kept theon the feed-dog. feed-dog is so constructed that when the dog is liftedso as to permit the removal of the bobbin 8 from the hook, or theremoval of the hook or bobbin-case, spring 80 will hold the saidfeed-dog in its inoperative position; then when the dog is returned toits operative position, the spring will also securely hold it in thisposition. The manner in which this feed dogis removed from its operativeposition, and the manner in which- This extension'82 of the it is heldin its operative position,rwill be clearly understood by referring toFigs. 1 and 5. It will be understood that not only the pressure of thespring 80, but also the pressure of the presser bar'27 tendto hold thefeed-dog in its operative position, as the said dog extends beyond itspivot under the presser-foot. The bottom of the feed-dog 7 7 ,isprovided with flat portions 7 7 on opposite sides of its portion 79,which rest 'on corresponding fiat portions 75 of the arms 75 and 76 ofthefeed-bar 63, thus insuring the proper horizontal position of the dogduring the operation of the machine.

I have found by actualtest that a comparatively light spring may be usedto hold the feed-dog in its operative position so that the said dog maybe easily turned out of-the way of the bobbin and. that with this com-.paratively light spring the feed-dog-may be run at any rate requiiged ofit in a sewing machine. in fact, I have tested this feeddog undertheseconditions with a light" spring up to over 3,500 stitches a niinuteand found it to work perfectly and feed the work just the same as afeed-dog that is rigidly attached to its bearings. If found also underthis very high rate of speed, that the spring ever 71 roperly inengagement with the block 33 ancl that the said spring 74 can also be acomparatively light spring. Ascan be readily understood, the presserbar"spring, by" reason-of its pressure on the foot and through it on thefeed-dog, also operates to keep the said lever 71in engagement with thejacket or block 33.

In the modified form of my invention shown i. Figs. 6 and 7 of thedrawings, the

jacket or block 33 is provided with lugs .33 which embrace the arm 71-of the lever 71, the latter being slottedat 71 on the pin 33*, extendingthroughthe lugs .33 and fixed thereto in any suitable manner.

the same being curved around the front of the looper, as shown in Figs.1, 4 and 5 and of a height to extend above the feed-dog actuatingmechanism. The plateissecured 1n for the reception of a sliding shoe 71pivotally supported place on the top of the bracket d, by means of carsg, through which extend screws g into said bracket. The function of thisguard-plate or apron is to prevent any possibility of the loo from thehook oi the looper, from contacting, or in any manner becomingentangled, with the adjacent arts of the feed mechanism, or being soiledthereby.

The throatlate is composed of two parts 0 and c, the ormer being fixedto the bedplate by screws 0 and the latter sliding in Fig. 1. Theseseveral parts of the presserfoot form no part of my present inventionand have been shown and described only to clearly portray the inventionof this application.

In the operation of my feeding device it is 'to be notedthatthe lever35, is oscillated positively on its axis by means of the block 33engaging the lateral walls .of the jaws of said lever 35, see Fig. 5.This oscillation of the said lever is transmitted to the arm 43 of thesame. And by reason of the connection between the same and the lever 49,the said oscillating movement is transmitted to said lever 49, andthrough it to the feed dog 7.7.' It is by this means that the feed dog77, is

given its horizontal movement which carries the work forward.

The parts are so constructed that the pivots 54 and 69 lie insubstantially a horizontal plane, during the time the feed dog isexposed above the needle plate, and the same is moving the work forward.It is thus seen that during this movement the upper end of the lever 49,moves about the axis of the pivot 54, and the upper end of the link 68moves about the axis of the pivot 69, it will thus be understoodthat thefeed dog is in substantially a horizontal position during its functionalmovement of carrying the work forward. In Figs. 5 and 6 the parts areshown substantially in the position of having made one half of saidfunctional movement.

Referring now to the vertical movement of the feed dog, it will be seenthat the rotation of the shaft B, and of the eccentric 28, carried byit, from' the position shown in Fig. 5 for example, reciprocate theblock 33 vertically between the jaws of the lever 35. movement of thesaid block is transmitted to the end 7150f the lever 71, and through itof needle-thread, as it slips And this to the connection 68, and thefeed dog carried by the same. Thus it is seen a vertical movement istransmitted to the feed dog at right angles to its horizontal movement,and it will be noticed that the pivot 69 being located aboutintermediate of the distance between the shaft B, and the pivot 54, thatthe movement of the eccentric 28 is reduced at the feed dog vertically.These parts are so pro ortioned that considerably less than ha'l of thecycle of movement of the eccentric 28 is used during the time the workis moved forward, and the balance of the cycle of movement of saideccentric is used in carrying the feed dog away from the work below theneedle. plate, and back again into engagement with the work.

The operation of the modified form of my device, is substantially thesame as in the form just described, the only difference being the feeddog is moved positively at all times while in the previous form justdescribed, it is depressed by the spring 74. The length of the stitch isincreased or de- .creased by' the adjustable connection between thelever 49 and the lever 35. It is obvious that by loosening the clampingnut 50, and adjusting the bolt 46 which carries the shoe 45, towards thepivot of the lever 35, the movement transmitted from said lever will bereduced and vice versa, and of course by reason of the connectionbetween said lever 49' and the feed dog the length of the stitch will beaccordingly changed.

In addition to the other advantages of this feed mechanism, simplicityof construction and compactness ofthe parts, and the very limited numberof said parts is to be observed. By the use of a single eccentric thefeed dog is given all of its movements, and all of these are positive,if it is so desired, or if preferred the spring 74 may be used todepress the feed dog. All the adjustments required for increasing ordecreasing the length of the stitches are present in this feedmechanism, and the said adjustments can be made by the thumb nut 50 asherein shown,

' or a lock nut may be used inplace of said thumb nut.

Another feature of the invention is its adaptation for use incombination with a hook mechanism that rotates in a horizontal plane, soconstructed and disposed that a reciprocating needle or a reciprocatingand laterally moving needle may be used in combination therewith. And afurther feature of the invention is the adaptation of the feed dog sothat it may extend over the looper, and be readily removed from abovethe same without "detaching it from its bearings. The

bobbin controller as beforenoted is also an element of my completeinvention, and the bracket which is adapted to carry my feedingmechanism, my loopermechanism and all of a my said bobbin controllermechanism, is also ward end of the shaft B.

- It is obvious that changes can be madev in the foregoing describedinvention without departing from the spirit of the same, there'- fore Ido not wish to be confined to the form of my invention herein disclosed.

My invention having been described in detail and the operation thereofset forth, the following important features are'claimed as new.

1. A feeding mechanism for sewing machines comprising a shaft, aneccentric secured to said shaft, a block mounted on said eccentric, apivoted lever having jaws that embrace said block, a feed dog, meansadapting said lever to move said feed dog horizontally, and meansadapting said block to move said feed dog vertically.

2. A feeding mechanism for sewing machines comprising-a revolving shaft,an eccentric secured to said shaft, a feed dog, means operated by saideccentric for givin the feed dog a vertical and a horizonta movementsaid means comprising adever having j awsbetween which said eccentricislocated, a second lever adapted to reciprocate said feeddoghorizontally, an adjustable connection betweensaid levers wherebytheextent of the horizontal movement of the feed dog is controlled,an'd'means adapting said eccentric to reciprocate said feed dogvertically.

3. A feeding 'mechanism" for sewing machines comprising a revolving.shaft, an ec-,

centricfmounted 'on said shaft, a block mounted on said eccentric, apart in engagement with said block whereby theblock is restrained fromrevolving with the eccentric,

a feed dog, and a connection between said part and said feed dog wherebythe dog is reciprocated horizontall a leverone end of movement of saidlever.

which is positively osclllated from the move; ment ofsaid block, andmeans whereby the feed dog is operated vertically from the 4. Afeeding-mechanism comprising a feed cured to said. shaft,'a single: partmounted on said eccentric, a, lever having jaws between which said artis located, and means intermediate sai part and .the feed dog wherebythe dog is reciprocated horizontally and vertically from the movement ofsaid part.

5 A feeding mechanism for sewing ma chines comprising a feed dog,arevolvmg *shaft, an eccentric secured to said shaft, a

block mounted on said eccentric, a lever hay-- in, a feed-dog rigidlyattached to the shaft,

yielding means for holding said dog in opera tive position on thefeed-bar, and means for actuating the said feed-bar to feed the work.

7. A feeding mechanism for sewing ma chines comprising a revolving cam,a ivoted lever having an end that extends ob ique-to the vertical, meansadapting said cam to 05* cillate said lever, a second lvoted lever oneend of which is parallel wit the oblique eX- r tending part of saidfirst lever and the other end of which extends verticall an adjustableconnection between the ob ique extendmg parts of said levers, a feeddog, a connection between the vertically extending and of said secondlever and said feed dog whereby the dog is operated horizontally, andmeans for operating said feed dog vertically.

8. A feeding mechanism comprising afeeddog having oppositely extendingjournals, a feed-bar supported on said journals, means forsupportin saidjournals so that the dog may be mova le independently of said bar, andmeans for imparting feed-movements to said bar and dog.

9. A feeding mechanism for sewing machines comprising a detachablebracket, a revolving shaft one end of which is located in a bearing insaid bracket, an eccentric secured to said shaft, a block mounted onsaid-eccentric, a lever one end of which is in engagement with saidblock, means adapting said lever to operate the feed dog horizontally, a

feed dog, and means intermediatesaid block and said feed do'g wherebysaid dog is reciprocated vertically.

. 10. A feeding mechanism for sewing machines com rising a detachablebracket, a revolving s aft, having a bearing in said bracket, aneccentric secured to said shaft, a block mounted on said eccentric, alug projecting downwardly-fromsaid bracket below said shaft, a leverpivoted onsai'd lu one end of which embraces said block, a fee -dog andmeans for carrying the same pivoted on said bracket, means intermediatesaid i lever and said feed dog whereby the dog is operated horizontallyfrom the movement said lever, and means for operating said feeddogvertically 1 1. In combination in a sewing machine, a I

feeding mechanism eomprisin a shaft, a, cam secured to said shaft, ablogr mounted on' said cam a feed do ,'means intermediate said block andsaid eed dog whereby said lie dog is loperated vertically andhorizontally from the movement of said block, and a deformed on the hubof saidgear wheel, a feed comprising a looper, means for revolving saidtachable bracket adapted to carry said feeding mechanism.

12. In combination, a looper'mechanism looper comprising a revolvingshaft, a gear wheel mounted on said shaft, an eccentric dog, and meansintermediate said eccentric and said feed dog whereby the dog isoperated vertically and horizontally from the movement of saideccentric.

13. A feeding mechanism having in combination a driving-shaft carryingan eccentrio, a block surrounding said eccentric, a lever having armsembracing said block, a 1 bell-crank lever adjus-t'ably connected tosaid lever, a feed-bar supported by said bell crank lever, 'a feed-dogcarried by the bar, and means connecting said bar with the block. i

14. A feeding mechanism comprising a driving-shaft carrying aneccentric, a lever pivoted below the drivingshaft, a bellcrank lever, anadjustable connection between the two said levers, a feed-bar carried bythe bell-crank lever, a horizontally disposed lever,connectionbetweenthe feed-bar and said latter lever, a feed-dog carried by thebar, and operative connections between the eccentric and th horizontallydisposed Witnesses:

lever and the first said foyer, substantially as described.-

15. In combination, a feeding mechanism comprising a feed dog, means foroperating said feed dog, a looper mechanism comprisinga looper, meansfor revolving said looper twice to each horizontal reciprocating move-'ment of said feed dog, and a detachable bracket adapted to carry .saidmechanisms.

16, In combination,-a detachable bracket for sewing machines, a loopermechanism carried by said bracket, a feeding mechanism carried by saidbracket, a bobbin controller mechanism carried by said bracket, a revolving shaft having a bearing in said bracket, and means adapting saidrevolving shaft to operate said mechanisms.

17. In combination, a detachable bracket for sewing machines, a loopermechanism having a revolving part carried by said bracket, a feedingmechanism carried by said bracket, and means operated by said revolvingpart of said looper mechanism adapted to operate said feeding mechanism.

In testimony whereof I have hereunto signed my name in the presence oftwo subscribing witnesses.

WILLIAM N. PARKESQ GHAs. MOO. CHAPMAN, M. HERSKOVITZ.

